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Robertson RT; Gallardo KA; Claytor KJ; Ha DH; Ku KH; Yu BP; Lauterborn JC; Wiley RG; Yu J; Gall CM; Leslie FM 《Cerebral cortex (New York, N.Y. : 1991)》1998,8(2):142-155
The role of basal forebrain-derived cholinergic afferents in the
development of neocortex was studied in postnatal rats. Newborn rat pups
received intraventricular injections of 192 IgG-saporin. Following survival
periods ranging from 2 days to 6 months, the brains were processed to
document the cholinergic lesion and to examine morphological consequences.
Immunocytochemistry for choline acetyltransferase (ChAT) and in situ
hybridization for ChAT mRNA demonstrate a loss of approximately 75% of the
cholinergic neurons in the medial septum and nucleus of the diagonal band
of Broca in the basal forebrain. In situ hybridization for glutamic acid
decarboxylase mRNA reveals no loss of basal forebrain GABAergic neurons.
Acetylcholinesterase histochemistry demonstrates a marked reduction of the
cholinergic axons in neocortex. Cholinergic axons are reduced throughout
the cortical layers; this reduction is more marked in medial than in
lateral cortical areas. The thickness of neocortex is reduced by
approximately 10%. Retrograde labeling of layer V cortico-collicular
pyramidal cells reveals a reduction in cell body size and also a reduction
in numbers of branches of apical dendrites. Spine densities on apical
dendrites are reduced by approximately 20-25% in 192 IgG- saporin-treated
cases; no change was detected in number of spines on basal dendrites. These
results indicate a developmental or maintenance role for cholinergic
afferents to cerebral cortical neurons.
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Spontaneous ventriculostomy. Report of two cases demonstrated by Pantopaque ventriculography 总被引:1,自引:0,他引:1
A Zilkha 《Radiology》1974,111(3):633-637
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A L Magos K J Zilkha J W Studd 《Journal of neurology, neurosurgery, and psychiatry》1983,46(11):1044-1046
The suppression of cyclical ovarian activity and the creation of constant oestradiol levels in blood by subcutaneous oestradiol implants has been used to treat 24 patients with menstrual migraine for up to five years. Twenty-three patients improved with treatment, 20 (83%) became completely or almost completely headache-free. Regular monthly periods were induced with cyclical oral progestogens. The treatment was not associated with any problems. The results support the concept that oestrogen withdrawal in the late luteal and menstrual phases of the ovarian cycle is the important precipitating factor in menstrual migraine, and such attacks can be prevented by suppressing the hormonal fluctuations associated with the ovarian cycle. 相似文献